Screen device

Abstract

An adjuster 10 that forms a free end 61 of a first guide 6 is connected to first guide units 63; a pair of hollow first stoppers 103, 103 that are opposed to each other in the Y-axis direction are provided on the adjuster 10 at an end thereof to which the first guide units 63 are connected; each of the first stoppers 103 has an open end 103a at a side thereof close to the first guide units 63, has a closed end 103b at the opposite side thereof from the open end 103a, and has a linear notch 103c formed on an inner surface thereof facing the other first stopper 103; stopping units 64 are connected to the first guide unit 63 that is located at the other end in the X-axis direction of a section 62 pulled out from a first stile 2 of the first guide 6; and each of the stopping units 64 is obtained by removing a support piece 63h from each of the first guide units 63 and has a second stopper 64a provided at a connecting end thereof with respect to the first guide unit 63, the second stopper 64a standing and extending from a rail section 63g to the other end of a side wall 63a in the Z-axis direction.

Description

[Technical field]

[0001] The present invention relates to a screen device that is applied to light blocking and light adjusting means such as curtains and blinds, as well as to screen doors and partitions. [Background technology]

[0002] Conventionally, this type of screen device generally comprises a screen that can be freely deployed and retracted, and a pair of frames consisting of a first frame and a second frame that are elongated and hollow in the Z-axis direction, at least one of which is slidable in the X-axis direction and arranged opposite to each other in the X-axis direction, with the screen being deployed and retracted in the X-axis direction among three orthogonal axes, the X-axis, the Y-axis, and the Z-axis. When the slidable frame is slid in one direction in the X-axis direction, it is pulled out from inside the slidable frame in the other direction in the X-axis direction, and when the slidable frame is slid in the other direction in the X-axis direction, The screen is provided with a first guide and a second guide housed inside and having a free end at one end, and a tension member housed inside a slidable frame and connecting the free ends of the first guide and the second guide, one end of the screen in the X-axis direction is fixed to the first frame and the other end of the screen in the X-axis direction is fixed to the second frame, the part of the first guide pulled out from inside the slidable frames extends in a straight line in the X-axis direction between one end of the Z-axis direction of the pair of frames, and the part of the second guide pulled out from inside the slidable frames extends in a straight line in the X-axis direction between the other end of the Z-axis direction of the pair of frames.

[0003] One such screen device is known in which a first guide is formed by connecting a plurality of first guide units, and each first guide unit has a pair of side walls arranged opposite each other in the Y-axis direction when the first guide is pulled out from inside a slidable frame, and a bottom wall connecting the both side walls, and in the first guide, one of two adjacent first guide units is pivotally supported to the other first guide unit, and this pivoting allows the first guide to bend in the other Z-axis direction while maintaining its linearity in the X-axis direction, and one end of the unfolding screen in the Z-axis direction is inserted between the both side walls of each first guide unit in the part of the first guide that is pulled out from inside the slidable frame (see, for example, Patent Document 1).

[0004] In the above-mentioned screen device, a pair of pins facing inward in the opposing direction of both side walls are provided at one end in the X-axis direction of both side walls of each first guide unit, which corresponds to one end in the Z-axis direction of the first guide pulled out from the slidable frame, and a pair of openings are opened at the other end in the X-axis direction.The two first guide units are connected by loosely fitting the pins of one first guide unit into the openings of the other first guide unit, with both pins forming a pivot, and each first guide unit is free to pivot.

[0005] A rigid protrusion is provided on the side of each of the first guide units on the side where the pins are provided, protruding inward in the opposing direction of the side walls. In the first guide, the rigid protrusion extends along a virtual line within a plane including the virtual line connecting the center of the pivot of each of the first guide units in the connecting direction of the first guide units. When the first guide is pulled out in the other X-axis direction as the slidable frame slides in one X-axis direction, the rigid protrusion pierces one Z-axis end of the screen inserted between the both walls of each of the first guide units in the pulled-out portion of the first guide, and holds the one Z-axis end of the screen so as not to come off from the pulled-out portion of the first guide even if the deployed screen is subjected to an external force such as wind pressure.

[0006] However, although the first guide units are rigid protrusions, they are generally integrally molded resin products, and as the screen is deployed and retracted, they repeatedly pierce and fall off one end of the screen in the Z-axis direction, causing problems such as bending and deformation, or breaking and breaking. In addition, the type of screen is generally changed depending on the purpose and installation location of the screen device. Therefore, if the molding material of each of the first guide units is stronger than the screen, there is a risk that the one end of the screen in the Z-axis direction will be damaged when the rigid protrusion pierces it. In order to prevent this damage to the screen, in the case of the above screen device, it is necessary to manufacture multiple types of first guide units using materials corresponding to the types of screens. As a result, there are multiple types of first guides.

[0007] Therefore, the applicant has proposed a screen device that can suppress damage to the Z-axis end of the screen that is inserted into the first guide even when the screen is repeatedly unfolded and stored, and that can form the first guide using only one type of first guide unit regardless of the type of screen (Patent Application No. 2020-038505 (unpublished)).

[0008] In the above-mentioned screen device, a pair of pins facing outward in the opposing direction of both side walls are provided at one end in the X-axis direction of both side walls of each first guide unit, and a pair of openings are opened at the other end in the X-axis direction. Two adjacent first guide units are connected by loosely fitting each pin of one first guide unit into each opening of the other first guide unit, both pins form a pivot, and each first guide unit is free to pivot.

[0009] In addition, rail portions are provided on the inner side of both side walls in the opposing direction of each first guide unit, and these rail portions extend along an imaginary line within a plane including the imaginary line connecting the centers of the pivot axes of each first guide unit in the connection direction of the first guide units, and support pieces protruding inward in the opposing direction of both side walls are provided at the end edges of both side walls farther away from the bottom wall in the other Z-axis direction than the rail portions.

[0010] Furthermore, a screen removal prevention member having a long base that is freely bendable in the pivot direction of each first guide unit and a number of needle-shaped portions attached at intervals is removably attached to the inner side in the opposing direction of both side walls of each first guide unit, and when each screen removal prevention member is in the attached state, the base is supported between each rail portion and each support piece of each first guide unit, and all of the needle-shaped portions protrude inward in the opposing direction of both side walls of each first guide unit.

[0011] When the first guide is pulled out in the other X-axis direction as the slidable frame slides in one direction, the needle-shaped portion of each screen removal member penetrates into one Z-axis end of the screen that is inserted between both side walls of each first guide unit in the pulled-out portion of the first guide, making the screen unable to be removed from the pulled-out portion of the first guide. On the other hand, when the first guide is stored inside the slidable frame as the slidable frame slides in the other X-axis direction, the needle-shaped portion of each screen removal member comes out of one Z-axis end of the screen. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] European Patent Publication No. 2333229 Summary of the Invention [Problem to be solved by the invention]

[0013] As described above, the base of each screen prevention member is supported between the rails and support pieces provided on each first guide unit, but to allow for removable attachment of each screen prevention member, the rails and support pieces are open in the longitudinal direction of the base of each screen prevention member. Therefore, if the first guide is repeatedly pulled out of and stored into the slidable frame, there is a risk that each screen prevention member will slip out in the longitudinal direction of the base from between the rails and support pieces of the first guide units that support its base.

[0014] In view of the above, an object of the present invention is to provide a screen device that can prevent each screen prevention member from slipping out in the longitudinal direction of the base from between each rail portion and each support piece provided on each first guide unit of the first guide, without interfering with the needle-shaped portion, even when the first guide is repeatedly pulled out of and stored into a sliding frame. [Means for solving the problem]

[0015] In order to solve the above problems, the present invention provides a screen that can be freely deployed and stored, and a pair of frames consisting of a first frame and a second frame that are elongated and hollow in the Z-axis direction, at least one of which is slidable in the X-axis direction and arranged opposite to each other in the X-axis direction, with the screen being deployed and stored in the X-axis direction among three orthogonal axes, the X-axis, the Y-axis, and the Z-axis; and when the slidable frame is slid in one direction in the X-axis direction, a first frame is pulled out from inside the slidable frame in the other direction in the X-axis direction, and when the slidable frame is slid in the other direction in the X-axis direction, a tension member that is housed inside a slidable frame and connects the free ends of the first guide and the second guide, one end of the screen in the X-axis direction is fixed to the first frame and the other end of the screen in the X-axis direction is fixed to the second frame, and the portion of the first guide that is pulled out from inside the slidable frame extends linearly in the X-axis direction between one end of the pair of frames in the Z-axis direction, and the portion of the second guide that is pulled out from inside the slidable frame extends linearly in the X-axis direction between the other end of the pair of frames in the Z-axis direction. The device includes a first guide formed by connecting a plurality of first guide units, each of which has a pair of side walls arranged opposite to each other in the Y-axis direction and a bottom wall connecting both side walls, and in the first guide, one of two adjacent first guide units is pivotally supported to the other first guide unit, and this pivoting allows the first guide to bend in the other Z-axis direction while maintaining linearity in the X-axis direction, and to be deployed between both side walls of each first guide unit in the portion of the first guide pulled out from inside the slidable frame. One end of the screen in the Z axis direction is inserted, and one end of both side walls of each first guide unit in the X axis direction is provided with a pair of pins pointing outward in the opposing direction of both side walls, and a pair of openings is opened in the other end in the X axis direction, two adjacent first guide units are connected by loosely fitting each pin of one first guide unit into each opening of the other first guide unit, both pins form a pivot, and each first guide unit is freely pivotable, and rail portions are provided on the inner parts of both side walls of each first guide unit in the opposing direction, and these rail portionsSupport pieces are provided at the edge portions of both side walls which are farther in the other Z-axis direction from the bottom wall than the rail portions and which extend along an imaginary line within a plane including the imaginary line connecting the centers of the pivots of each first guide unit in the coupling direction of the first guide units, and which protrude inward in the opposing direction of the both side walls. A screen removal preventing member having a long base which is bendable in the pivot direction of each first guide unit and has a number of needle-shaped portions attached at intervals to it is removably attached to the inner side of the opposing direction of both side walls of each first guide unit, and when each screen removal preventing member is attached, the base is in contact with each rail portion of each first guide unit and each The screen is supported between the support pieces, and all of the needle-like portions protrude inward in the opposing direction of both side walls of each first guide unit. When the first guide is pulled out in the other X-axis direction as the slidable frame slides in one X-axis direction, the needle-like portions of each screen removal member pierce one end of the screen in the Z-axis direction that is inserted between both side walls of each first guide unit in the pulled-out portion of the first guide, making it impossible for the screen to be removed from the pulled-out portion of the first guide. Meanwhile, when the slidable frame slides in the other X-axis direction, the needle-like portions of each screen removal member pierce one end of the screen in the Z-axis direction that is inserted between the both side walls of each first guide unit in the pulled-out portion of the first guide, making it impossible for the screen to be removed from the pulled-out portion of the first guide. When the first guide is stored, the needle-shaped portion of each screen removal member comes off from one end of the screen in the Z-axis direction, and a long adjuster that forms the free end of the first guide and has a weight attached thereto and moves up and down in the Z-axis direction inside a slidable frame is connected to a first guide unit located at the other end of the first guide in the Z-axis direction when stored inside the slidable frame, and the adjuster is provided with a pair of hollow first stoppers facing each other in the Y-axis direction at the end on the side where the first guide unit is connected, and each first stopper opens toward the first guide unit. Each of the first stoppers has an open end and a closed end on the side facing the open end in the longitudinal direction of the adjuster, and a linear notch is formed on each of the inner surfaces of the opposing directions of the first stoppers on an extension line of the first guide unit rail portion connected to the adjuster, and a stopping unit is connected to the first guide unit located at a position corresponding to the other end in the X-axis direction of the pulled-out portion when the first guide is pulled out from inside the slidable frame, and when the support piece is removed from the first guide unit, the stopping unit is connected to the connecting end with the first guide unit,A second stopper is provided which extends upright from each rail portion to the other end of each side wall in the Z-axis direction, and when each screen removal prevention member is in an attached state, one longitudinal end of the base of each screen removal prevention member is inserted into the inside of each first stopper of the adjuster, one longitudinal end of the base abuts against the closed end of each first stopper, and the other longitudinal end of the base of each screen removal prevention member abuts against the second stopper of the stopping unit, and at the portion of each screen removal prevention member where the base is inserted into the inside of each first stopper, the needle-shaped portion protrudes inward in the opposing direction of the two first stoppers through the notch and is not in contact with the second stopper.

[0016] According to the present invention, when each screen removal prevention member is attached to each first guide unit of the first guide, movement of each screen removal prevention member in the longitudinal direction of the base is restricted. Therefore, even when the first guide is repeatedly pulled out from and stored into the slidable frame, it is possible to prevent each screen removal prevention member from slipping out in the longitudinal direction of the base from between each rail portion and each support piece provided in each first guide unit of the first guide.

[0017] Furthermore, at one longitudinal end of each screen removal prevention member that enters inside each first stopper, the needle-shaped portion protrudes inward in the opposing direction of the first stoppers through the notch and is not in contact with the second stopper. Therefore, it is possible to prevent the base of each screen removal prevention member from being removed in the longitudinal direction without interfering with the needle-shaped portion. [Brief description of the drawings]

[0018] [Figure 1] 1 is a partially cutaway cross-sectional view showing an embodiment of a screen unit of the present invention. [Diagram 2] 2 is a perspective view of a main portion showing one embodiment of a first guide of the screen unit shown in FIG. 1. [Diagram 3] 3A is a side view of the first guide shown in FIG. 2, and FIG. 3B is a front view of the first guide shown in FIG. [Figure 4]3(a) is a side view of the first guide unit shown in FIG. 2 and FIG. 3(a) and (b), (b) is a plan view of the same, (c) is a bottom view of the same, and (d) is a front view of the same. [Diagram 5] 3(a) is a side view of the screen removal preventing member shown in FIG. 2 and FIG. 3(a) and (b), and FIG. [Figure 6] 4 is a cutaway side view of a main portion illustrating a bent state of a screen removal preventing member when a first guide illustrated in FIG. 2 and FIG. 3(a) and (b) is bent. [Figure 7] 3A and 3B are perspective views of the main part showing a state in which an adjuster and a stopping unit are connected to the first guide shown in FIG. 2, respectively. [Figure 8] 8 is a plan view of a main portion showing one embodiment in which a first guide to which the adjuster and the stopping unit shown in FIGS. 7(a) and (b) are connected is applied to the screen device shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] 1, the screen unit SD of this embodiment includes a screen 1 that can be freely deployed and stored, and is installed in an opening of, for example, a window frame, a door frame, etc., and opens and closes the opening horizontally by the screen 1. That is, in the screen unit SD, the deployment and storage direction of the screen 1 is the X-axis direction of three orthogonal axes, the X-axis, the Y-axis, and the Z-axis direction corresponds to the horizontal direction (the left-right direction in FIG. 1), and the Z-axis direction corresponds to the vertical direction (the up-down direction in FIG. 1). Therefore, in the following description, one side in the X-axis direction is the left, the other side in the X-axis direction is the right, one side in the Z-axis direction is the bottom, and the other side in the Z-axis direction is the top.

[0020] The screen device SD comprises a first frame 2 which is vertically long and hollow and can slide freely in the left-right direction through the opening, and a second frame 3 which is vertically long and hollow and is disposed opposite the first frame 2 in the left-right direction and fixed to the right end of the opening, and the first frame 2 and the second frame 3 form a pair of frames. The left end of the screen 1 is fixed to the first frame 2, and the right end of the screen 1 is fixed to the second frame 3. Specifically, the left end of the screen 1 is fixed to the right end of the first frame 2, and the right end of the screen 1 is fixed to a vertical part of the outer periphery of a roller pipe 31 which is vertically long and hollow and is rotatably housed inside the second frame 3. When a user of the screen device SD performs a closing operation by sliding the first frame 2 to the left, the screen 1 is unwound from the outer periphery of the roller pipe 31 and deployed in the opening, and when the user stops the closing operation, the screen 1 is wound up around the outer periphery of the roller pipe 31 and stored inside the second frame 3. At this time, the first frame 2 automatically slides to the right, and when its right end comes into contact with the left end of the second frame 3, the sliding of the first frame 2 to the right automatically stops.

[0021] In order to realize such automatic storage of the screen 1 inside the second frame 3, a coil spring 31a is provided inside the roller pipe 31. When the first frame 2 is slid leftward and the roller pipe 31 rotates forward inside the second frame 3, and the screen 1 is unwound, the coil spring 31a is twisted around the rotation axis of the roller pipe 31, generating and accumulating a resilient force. When the user stops the closing operation, the accumulated resilient force is released, the roller pipe 31 rotates backward inside the second frame 3, and the screen 1 is wound up around the outer periphery of the roller pipe 31.

[0022] In order to smoothly slide the first frame 2 in the left-right direction, the screen device SD is provided with an upper rail 4 at the upper end of the opening and a lower rail 5 at the lower end of the opening. The upper rail 4 is a hollow member having a U-shaped cross section in the up-down direction, and the upper end of the first frame 2 is inserted inside the upper rail 4. The lower rail 5 is a linear member that is long in the left-right direction. A wheel (not shown) is provided at the lower end of the first frame 2, and this wheel rotates on the lower rail 5. In this way, the first frame 2 is guided by the upper rail 4 and the lower rail 5, and therefore smoothly slides in the left-right direction.

[0023] The screen device SD also includes a first guide 6 and a second guide 7 that are pulled out from inside the first frame 2 when the first frame 2 is slid leftward, and are stored inside the first frame 2 when the first frame 2 is slid rightward. The first guide 6 and the second guide 7 each have a free end 61, 71 at one end, and the portion 62, 72 pulled out from inside the first frame 2 extends linearly in the left-right direction between the lower end and the upper end of the first frame 2 and the second frame 3 as a pair of frames, respectively, while maintaining linearity in the left-right direction. The screen device SD also includes a tension member 8 that is stored inside the first frame 2 and connects the free ends 61, 71 of the first guide 6 and the second guide 7. The tension member 8 forms a loop that does not intersect and is arranged in the vertical direction. The loop formed by the tension member 8 may intersect.

[0024] 2, 3(a)(b), and 4(a), (b), (c), and (d), the first guide 6 is formed by connecting a plurality of first guide units 63. Each first guide unit 63 includes a pair of side walls 63a, 63a arranged opposite to each other in the Y-axis direction shown in FIG. 2, and a bottom wall 63b connecting both side walls 63a, 63a, and in the first guide 6, one of two adjacent first guide units 63, 63 is pivotally supported to the other first guide unit 63. Due to this pivotal support, the first guide 6 maintains linearity in the left-right direction while bending upward. In addition, a pair of pins 63c, 63c pointing outward in the opposing direction of both side walls 63a, 63a are provided at the upper left end of each first guide unit 63, which corresponds to the upper end of the first guide 6 pulled out from inside the first frame 2, and a pair of openings 63d, 63d are opened at the upper right end.

[0025] Specifically, in each side wall 63a of each first guide unit 63, a first recessed portion 63a1 is formed around each pin 63c, recessed inward in the opposing direction of both side walls 63a, 63a. The length of each pin 63c is the same as the recess width of the first recessed portion 63a1, and the outer diameter of each pin 63c and the inner diameter of each opening 63d are large enough that each pin 63c can be loosely fitted into each opening 63d. In addition, in each side wall 63a, a first cutout portion 63a2 is formed by cutting out the periphery of each opening 63d except for the upper end edge of each side wall 63a, and the upper end edge is formed as a protruding piece 63e extending to the right. Furthermore, a mountain portion 63f that protrudes upward is provided at the lower right end of the first recessed portion 63a1. Furthermore, a second recessed portion 63a3 is formed at the lower end of each side wall 63a below the first recessed portion 63a1, the second recessed portion 63a3 being recessed by the same amount as the first recessed portion 63a1. In each first guide unit 63, the bottom wall 63b is disposed at a position corresponding to the upper end of the second recessed portion 63a3 of both side walls 63a, 63a, and has a length from the left end of the second recessed portion 63a3 to below the left end of the first cutout portion 63a2.

[0026] In the first guide 6, two adjacent first guide units 63, 63 are connected by inserting the left end portions of both side walls 63a, 63a of one first guide unit 63 into the inner side of the opposing direction of both side walls 63a, 63a of the right end portion of the other first guide unit 63, and loosely fitting each pin 63c of the other first guide unit 63 into each opening 63d of the one first guide unit 63. At this time, both pins 63c, 63c form a pivot. The first guide 6 is formed by repeating such connections. The pivot range of two adjacent first guide units 63, 63 is from the position where the right end of the lower end of both side walls 63a, 63a of one first guide unit 63 contacts the left end of the lower end of both side walls 63a, 63a of the other first guide unit 63 to the position where each protrusion 63e of both side walls 63a, 63a of one first guide unit 63 contacts the mountain portion 63f of each first recessed portion 63a1 formed on both side walls 63a, 63a of the other first guide unit 63. The pivot range of each first guide unit 63 is the same, and by the pivoting of each first guide unit 63 within the above pivot range, the first guide 6 bends toward the upper end of the first frame 2 when stored inside the first frame 2, as shown in FIG. 1, and moves to the right when pulled out from inside the first frame 2, returning to the original state.

[0027] When the first guide 6 is pulled out from inside the first frame 2, the second recesses 63a3 formed on both side walls 63a of one of the first guide units 63 that pivots among the two adjacent first guide units 63 are inserted into the inner side of the opposing direction of both side walls 63a of the other first guide unit 63. Therefore, in the portion 62 of the first guide 6 pulled out from inside the first frame 2, the outer surfaces in the opposing direction at the lower end of both side walls 63a of each first unit 63 are arranged flush with each other. Also, as described above, the length of each pin 63c is the same as the recess width of the first recesses 63a1, so that the outer surfaces in the opposing direction of both side walls 63a of each pin 63c are arranged flush with the outer surfaces in the opposing direction at the upper end of both side walls 63a.

[0028] Further, in each first guide unit 63, a rail portion 63g is provided on the inner side of both side walls 63a, 63a in the opposing direction, and each rail portion 63g extends along the imaginary line VL in a plane including the imaginary line VL connecting the center of the pivot of each first guide unit 63 in the coupling direction of the first guide unit 63. Furthermore, a support piece 63h is provided on the upper end edge portion of both side walls 63a, 63a that is farther upward from the bottom wall 63b than the rail portion 63g and protrudes inward in the opposing direction of both side walls 63a, 63a. Each support piece 63h is disposed to face each rail portion 63g of each side wall 63a on the side where each support piece 63h is provided in the up-down direction, and forms a hollow storage portion 63i between each rail portion 63g and each side wall 63a (FIG. 4(d)). Specifically, each rail portion 63g has a length from the left end of each first guide unit 63 to the lower left end of the first cutout portion 63a2. Meanwhile, each support piece 63h extends in the left-right direction except for the left end of each first guide unit 63. Also, the front shape of each support piece 63h is L-shaped and includes a locking portion 63h1 that hangs down parallel to each side wall 63a, and an inclined portion 63h2 that extends downward toward the rail portion 63g side, inward in the opposing direction of both side walls 63a, 63a.

[0029] Each rail portion 63g functions as a guide when the screen removal preventing member 9 is attached to and detached from the first guide 6. Referring also to Figures 5(a) and (b), the screen removal preventing member 9 is composed of a long base portion 91 that is bendable in the pivot direction of each first guide unit 63 of the first guide 6, and a number of needle-shaped portions 92 attached to the base portion 91 at intervals. Each screen removal preventing member 9 is attached to the inner side of the opposing side walls 63a, 63a of each first guide unit 63 by inserting the base portion 91 into each storage portion 63i of each first guide unit 63 of the first guide 6. Each rail portion 63g guides the insertion of the base portion 91 into the storage portion 63i when each screen removal preventing member 9 is attached. When each screen removal prevention member 9 is attached, the base 91 is supported between each rail portion 63g and each support piece 63h, and all of the needle-shaped portions 92 protrude inward in the opposing direction of both side walls 63a, 63a of each first guide unit 63. Furthermore, each screen removal prevention member 9 can be removed from the first guide 6 by being guided by each rail portion 63g, by pulling out the base 91 from inside each storage portion 63i of each first guide unit 63 from either the left or right end of the first guide.

[0030] Specifically, the base 91 is locked by the locking portion 63h1 of the support piece 63h of each first guide unit 63, and all of the needle-shaped portions 92 are inclined toward the bottom wall 63b along the downward slope of the inclined portion 63h2 by the inclined portion 63h2 (FIG. 3(b)). Due to this inclination of all of the needle-shaped portions 92, in the first guide 6, a gap in the Y-axis direction shown in FIG. 2 is formed between the protruding tips of the needle-shaped portions 92 of the two screen removal members 9 attached to the both side walls 63a, 63a of each first guide unit 63.

[0031] Since the base 91 of the screen removal preventing member 9 is bendable in the pivot direction of each first guide unit 63 of the first guide 6 as described above, when the first frame 2 shown in Fig. 1 is bent toward the upper end, the screen removal preventing member 9 is also bent in the same direction as shown in Fig. 6. Also, since each rail portion 63g extends along the imaginary line VL in a plane including the imaginary line VL connecting the centers of the pivots of each first guide unit 63 in the coupling direction as described above, the base 91 of each screen removal preventing member 9 attached to the inner side of the opposing direction of both side walls 63a, 63a of each first guide unit 63 is arranged parallel to the imaginary line VL in a plane including the imaginary line VL as shown in Fig. 3(a). By arranging the base 91 parallel to the imaginary line VL in this manner, the pivoting of each first guide unit 63, i.e., the bending of the first guide 6, is realized smoothly. In addition, since the pivot is located at the upper end of the first guide unit 63, the pivot is disposed above and away from the lower end of the opening where the screen device SD is installed. Therefore, the pivot is not easily affected by dust, sand, mud, etc. that tend to accumulate at the lower end of the opening, and this, together with the smooth bending of the first guide 6, allows the user to perform the closing operation of the first frame 2 smoothly and stably. Similarly, the base 91 of the screen removal prevention member 9 easily returns from the bent state to its original state, so that the first guide 6 also smoothly returns to its original state when it is pulled out from inside the first frame 2. Therefore, the opening operation of the first frame 2 is also performed smoothly and stably.

[0032] The side walls 63a, 63a of each first guide unit 63 are provided with a recess 63j extending in the same direction as the portion 62 of the first guide 6 that is pulled out from inside the first frame 2 and extends in the left-right direction and recessed inward in the facing direction. The left end of each of the side walls 63a, 63a on which the recess 63j is provided is provided with a third recess 63a4 recessed inward in the facing direction of the side walls 63a, 63a, similar to the first recess 63a1 and the second recess 63a3. The third recess 63a4 is located between the first recess 63a1 and the second recess 63a3 on each side wall 63a. The inner surface in the facing direction of the right end of each of the side walls 63a, 63a on which the recess 63j is provided is cut out to form a second cutout 63a5 (FIGS. 4(b)(c)).

[0033] When the first guide 6 is pulled out from inside the first frame 2 and each first guide unit 63 pivots, the second notch 63a5 of the pivoting first guide unit 63 overlaps with the third recess 63a4 of the adjacent first guide unit 63 that has already pivoted. This overlap and the contact between the right end of the lower end of the side walls 63a, 63a of the pivoting first guide unit 63 and the left end of the side walls 63a, 63a of the first guide unit 63 that has already pivoted maintain the linearity of the portion 62 of the first guide 6 pulled out from inside the first frame 2. In addition, the inner faces of the side walls 63a, 63a in the opposing direction in which the recesses 63j are provided are arranged flush with each other.

[0034] In addition, as shown in Fig. 3(b) and Fig. 4(c)(d), in both side walls 63a, 63a of each first guide unit 63, the inner surface in the opposing direction of the lower end of each second recessed portion 63a3 is cut out to form a third cutout portion 63a6. The cutout width of each third cutout portion 63a6 is reduced from the left end to the right end of each second recessed portion 63a3. In addition, a guided piece 63k is provided that continues from the right end of each third cutout portion 63a6 and protrudes inward in the opposing direction of both side walls 63a, 63a. The right end of each guided piece 63k is located below the right end of the bottom wall 63b. When the first guide 6 is pulled out from inside the first frame 2, the guided pieces 63k, 63k engage with one end and the other end of the lower rail 5 in the Y-axis direction shown in FIG. 1, preventing each first guide unit 63 in the pulled-out portion 62 of the first guide 6 from coming off the lower rail 5. On the other hand, when the first guide 6 is stored inside the first frame 2, each third cutout 63a6 smoothly releases the engagement between each guided piece 63k and each of the one end and the other end of the lower rail 5 in the Y-axis direction, making it easier for each first guide unit 63 to come off the lower rail 5. As a result, the first frame 2 can slide more smoothly in the left-right direction.

[0035] Returning to FIG. 1, the right end of the first guide 6 is fixed to the lower end of the second frame 3 and serves as the fixed end. Also, the free end 61 of the first guide 6 is always housed inside the first frame 2. Specifically, the free end 61 is located at the upper end of a long adjuster 10 that moves up and down inside the first frame 2. The adjuster 10 is connected to a first guide unit 63 that is located at the upper end when the first guide 6 is housed inside the first frame 2. A massive weight 101 that is long in the vertical direction is attached to the adjuster 10. Gravity acting on the weight 101 acts on the portion of the first guide 6 housed inside the first frame 2, and assists the first guide 6 to be smoothly pulled out to the right from inside the first frame 2 against the elastic force of the coil spring 31a built in the roller pipe 31 when the first frame 2 is slid to the left, giving the user a sense of lightness and stability in the closing operation. In addition, gravity acting on the weight 101 provides an appropriate resistance to the first guide 6 being housed inside the first frame 2 when the first frame 2 is slid to the right to house the screen 1 inside the second frame 3. This resistance prevents the screen 1 from being suddenly wound around the outer periphery of the roller pipe 31 due to the release of the elastic force accumulated in the coil spring 31a.

[0036] At the lower end of the first frame 2, a pair of inner surfaces (not shown) facing each other in the Y-axis direction shown in FIG. 1 are provided with curved protrusions 11 curved at a predetermined curvature. The curved protrusions 11 are inserted into the recesses 63j of each first guide unit 63 to guide the first guide 6 to be stored and drawn out from inside the first frame 2. That is, the curved protrusions 11 bend the first guide 6 smoothly upward inside the first frame 2, and are curved at a predetermined curvature so that the first guide 6 can be returned to the right inside the first frame 2. Therefore, the first guide 6 can be stored and drawn out more smoothly inside the first frame 2.

[0037] In the screen device SD, when the first guide 6 is pulled out to the right from inside the lower end of the first frame 2 as the first frame 2 slides to the left, the lower end of the screen 1 is inserted between the side walls 63a, 63a of each first guide unit 63 in the pulled-out portion 62 of the first guide 6. Specifically, the lower end of the screen 1 is inserted into the above-mentioned gap between the protruding tips of the needle-like portions 92 shown in Figures 2 and 3(a) and (b) of the two screen removal preventing members 9 attached to the side walls 63a, 63a of each first guide unit 63. At this time, the needle-like portions 92 of the screen removal preventing members 9 pierce the lower end of the screen 1, making it impossible for the screen 1 to come out of the pulled-out portion 62 of the first guide 6. Also, when the first guide 6 is stored inside the first frame 2 with the rightward sliding of the first frame 2, the needle-like portion 92 of each screen removal prevention member 9 comes off from the bottom end of the stuck screen 1. As described above, in the screen device SD, the screen removal prevention member 9 is removably attached to the inner side of the opposing side walls 63a, 63a of each first guide unit 63 of the first guide 6, so that a plurality of types of screen removal prevention members 9 having a large number of needle-like portions 92 attached to the base 91 corresponding to the types of screen 1 can be prepared in advance. Then, an appropriate one can be selected from them and attached to the both side walls 63a, 63a of each first guide unit 63 of the first guide 6, so that damage to the bottom end of the screen 1 can be suppressed even when the screen 1 is repeatedly deployed and stored. Also, it is not necessary to prepare a first guide unit 63 for each type of screen 1, and the first guide 6 can be formed with only one type of first guide unit 63.

[0038] Each of the first guide units 63 may be an integrally molded product made of hard resin. The screen 1 may be made of cloth or net made of woven resin fibers in consideration of weight reduction. The base 91 of the screen retaining member 9 may be made of soft resin or light metal such as aluminum. The needle-shaped portion 92 may be made of an appropriate material corresponding to the type of the screen 1. The size of each of the needle-shaped portions 92 and the interval between each of the needle-shaped portions 92 may be appropriately set in accordance with the type of the screen 1. For example, when the screen 1 is a knitted fabric or net, each of the needle-shaped portions 92 may be sized to enter the stitches or meshes, and the interval between each of the needle-shaped portions 92 may be equal to the interval between the stitches or meshes. Furthermore, the curved protrusion 11 may be made of a material that is unlikely to cause wear and tear on each of the first guide units 63 even when the first guide units 63 are repeatedly inserted into the recesses 63j.

[0039] Furthermore, the second guide 7 of the screen device SD may be a conventional one. The conventional one is also formed by connecting a plurality of second guide units 73, similar to the first guide 6. Each second guide unit 73 also has a pair of side walls arranged opposite to each other in the Y-axis direction when the second guide 7 is pulled out from inside the first frame 2, and a bottom wall connecting both side walls. In addition, the second guide 7 may also be such that one of two adjacent second guide units 73 is pivotally supported by the other second guide unit 73, and the upper end of the unfolded screen 1 is inserted between both side walls of each second guide unit 73 in the portion 72 pulled out from inside the first frame 2. Similarly to the first guide 6, the right end of the second guide 7 is fixed to the second frame 3, making it a fixed end.

[0040] In the screen device SD, the first guide 6 and the second guide 7 housed inside the first frame 2 are housed in different regions inside the first frame 2. That is, a first guide piece 21 is provided on each of a pair of inner sides of the first frame 2 facing each other in the Y-axis direction, extending in the longitudinal direction of the first frame 2 except for both upper and lower ends of the first frame 2 and protruding inward in the facing direction of both inner sides. The first guide pieces 21 divide the inside of the first frame 2 into a first storage section 22 that houses the first guide 6 and a second storage section 23 that houses the second guide 7. The first storage section 22 is located on the left side, which is one side in the X-axis direction inside the first frame 2, and the second storage section 23 is located on the right side, which is the other side in the X-axis direction inside the first frame 2. In this way, by dividing the storage area of ​​the first guide 6 and the second guide 7 in the first frame 2 into the first storage section 22 and the second storage section 23, the first guide 6 and the second guide 7 stored inside the first frame 2 do not collide with each other and can pass each other inside the first frame 2. Therefore, the overall length of the first guide 6 and the second guide 7 can be made to correspond to the left-right dimension of the opening in which the screen device SD is installed. In addition, the needle-shaped part 92 of the screen removal prevention member 9 attached to the inner side of the opposing direction of both side walls 63a, 63a of each first guide unit 63 in the first guide 6 is not damaged by the second guide 7, and no structural constraints are imposed on the second guide unit 73 forming the second guide 7. Furthermore, in each first guide unit 63 of the first guide 6, the bottom wall 63b is positioned so as to be separated from the lower rail 5 at the part 62 drawn out from the first storage section 22 in order to make it less susceptible to the influence of dust, sand, mud, etc. that tend to accumulate at the lower end of the opening in which the screen device SD is installed. For this reason, the vertical dimension of each first guide unit 63 of the first guide 6 is relatively large. Therefore, by positioning the first storage section 22 on the left side inside the first frame 2, the curvature of the bending when the first guide 6 is stored in the first storage section 22 and drawn out can be made relatively large, and the first guide 6 can be stored in the first storage section 22 and drawn out from the first storage section 22 more smoothly.

[0041] The protruding ends of both first guide pieces 21, 21 are disposed apart in the Y-axis direction, and the tension member 8 can be inserted into both the first storage section 22 and the second storage section 23. Both first guide pieces 21, 21 guide the elevation of the adjuster 10 of the first guide 6, and are connected to a second guide unit 73 located at the lower end when the second guide 7 is stored in the second storage section 23, and guide the elevation of the guided member 12 that forms the free end 71 of the second guide 7. The free end 71 of the second guide 7 is located at the lower end of the guided member 12.

[0042] In this way, when the first guide 6 and the second guide 7 are respectively stored in the first storage section 22 and the second storage section 23, which are different regions inside the first frame 2, the first frame 2 has a relatively large visible dimension (dimension in the left-right direction). In consideration of this, it is desirable to adopt a second guide unit 73 in which the vertical dimensions of both side walls of the second guide unit 73 at the portion 72 pulled out from the second storage section 23 of the first frame 2 are shorter than the vertical dimensions of both side walls 63a, 63a of the first guide unit 63 at the portion 62 pulled out from the first storage section 22 of the first frame 2, as shown in FIG. In this case, if it is difficult to provide the second guide 7 with a screen removal prevention member 9 such as that attached to the first guide 6, a screen removal prevention member 13 long in the left-right direction can be attached to each of a pair of inner surfaces of the upper rail 4 facing each other in the Y-axis direction via support pieces or the like. The screen removal-preventing member 13 can have a similar configuration to the screen removal-preventing member 9, for example, and in this case, each needle-shaped portion of the screen removal-preventing member 13 pierces the upper end portion of the deployed screen 1, thereby preventing the deployed screen 1 from coming off the upper rail 4 even when subjected to an external force such as wind pressure. Furthermore, damage to the upper end portion of the screen 1 can be prevented even when the screen 1 is repeatedly deployed and stored.

[0043] In addition, in the screen device SD, a bent guide 14 having a curved surface 141 curved at a predetermined curvature is provided at the upper end of the second storage section 23 of the first frame 2. The curved surface 141 of the bent guide 14 can come into contact with the bottom wall of each second guide unit 73 forming the second guide 7. The bent guide 14 pivots each second guide unit 73 by contacting the curved surface 141 with the bottom wall of each second guide unit 73, bending the second guide 7 downward and returning it to the left and right, thereby smoothly realizing the storage and withdrawal of the second guide 7 into and from the second storage section 23 as the first frame 2 slides in the left and right direction. The predetermined curvature of the curved surface 141 can be appropriately set in consideration of such bending and returning of the second guide 7.

[0044] Furthermore, in the screen device SD, direction-changing members 15, 15 such as pulleys are provided at both upper and lower ends of the first storage section 22 of the first frame 2. A tension member 8 is hung on each direction-changing member 15, and each direction-changing member 15 changes the direction of the tension member 8 in the Z-axis direction and applies a predetermined tension to the tension member 8.

[0045] 7(a) and (b), the adjuster 10 and the stopping unit 64 connected to the first guide unit 63 of the first guide 6 will be described. In the following, for the adjuster 10, the same reference numerals will be used to designate parts and the like that have already been described, and descriptions of those parts and the like will be omitted. Also, the stopping unit 64 has parts in common with the first guide unit 63, and the same reference numerals will be used to designate parts of the stopping unit 64 that are in common with the first guide unit 63, and descriptions of those parts will be omitted.

[0046] The adjuster 10 has a linear cut 102 formed in a portion corresponding to the lower end shown in FIG. 1 to avoid contact with each of the peaks 63f of the first guide unit 63 to be connected. The portion from the cut 102 to the portion located on the second storage section 23 side inside the first frame 2 shown in FIG. 1 is a pair of tongue-shaped portions 102a, 102a facing each other in the Y-axis direction, and each tongue-shaped portion 102a has a thickness corresponding to the recess of the first recess 63a1 of the first guide unit 63 to be connected. Each tongue-shaped portion 102a has an opening 102b into which the pin 63c of the first guide unit 63 to be connected fits loosely. The portion from the cut 102 to the opposite side of the second storage section 23 is a pair of skirt portions 102c, 102c facing each other in the Y-axis direction, and each skirt portion 102c is located outside the second recess 63a3 shown in FIG. 2 of the first guide unit 63 to be connected. The outer surfaces of the skirt portions 102c, 102c in the opposing direction are arranged on the same plane as the outer surfaces of the opposite side walls 63a, 63a of the first guide unit 63 to be connected thereto.

[0047] The adjuster 10 is provided with a pair of hollow first stoppers 103, 103 extending in the longitudinal direction of the adjuster 10 and facing each other in the Y-axis direction at a portion adjacent to each tongue-shaped portion 102a and each skirt portion 102c that are located at the same position in the Y-axis direction, i.e., at the end of the adjuster 10 on the side where the first guide unit 63 is connected. Each first stopper 103 has an open end 103a on the first guide unit 63 side connected to the adjuster 10, and a closed end 103b on the side opposite the open end 103a in the longitudinal direction of the adjuster 10. A linear notch 103c is formed on each of the inner surfaces of the first stoppers 103, 103 on the extension line of each rail portion 63g of the first guide unit 63 connected to the adjuster 10.

[0048] The stopping unit 64 is connected to the first guide unit 63, which is located at a position corresponding to the right end of the pulled-out portion 62 when the first guide 6 is pulled out from the first storage section 22 inside the first frame 2 shown in Fig. 1. The stopping unit 64 has the same configuration and structure as the first guide unit 63, except for the following two points. That is, in the stopping unit 64, the support piece 63h provided to protrude inward in the opposing direction of both side walls 63a, 63a of the first guide unit 63 is removed. Meanwhile, in the stopping unit 64, a second stopper 64a is provided at the connecting end with the first guide unit 63, which extends upright from each rail portion 63g to the upper end of each side wall 63a.

[0049] When mounting each screen removal preventing member 9 to each first guide unit 63 of the first guide 6, for example, the stopping unit 64 is removed from the first guide 6, and the base 91 of each screen removal preventing member 9 is inserted into each storage portion 63i shown in FIG. 4(d) of the first guide unit 63 to which the stopping unit 64 is connected. Next, when the base 91 is moved in the longitudinal direction of the first guide 6 along the rail portion 63g of each first guide unit 63, one longitudinal end of the base 91 of each screen removal preventing member 9 enters the inside of each first stopper 103 from the first guide unit 63 connected to the adjuster 10 through the open end 103a of each first stopper 103. Then, one longitudinal end of the base 91 of each screen removal preventing member 9 abuts against the closed end 103b of each first stopper 103. At this time, the needle-like portion 92 attached to the base 91 that has entered inside each first stopper 103 protrudes inward in the opposing direction of both first stoppers 103, 103 from the notch 103c formed in each first stopper 103. Also, the other longitudinal end of the base 92 of each screen removal preventing member 9 is disposed at the right end of the first guide unit 63 that is located at a position corresponding to the right end of the pulled-out portion 62 when the first guide 6 is pulled out from the first storage portion 22 inside the first frame 2. In this state, the stopping unit 64 is connected to the first guide unit 63 in which the other longitudinal end of the base 91 of each screen removal preventing member 9 is disposed. At this time, the other longitudinal end of the base 91 of each screen removal preventing member 9 abuts against the second stopper 64a of the stopping unit 64.

[0050] That is, when each screen removal preventing member 9 is attached to each first guide unit 63, as described above, the base 91 is supported between each rail portion 63g and each support piece 63h, and one longitudinal end of the base 91 of each screen removal preventing member 9 abuts against the closed end 103b of each first stopper 103, and the other longitudinal end of the base 91 of each screen removal preventing member 9 abuts against the second stopper 64a of the stopping unit 64. For this reason, movement of each screen removal preventing member 9 in the longitudinal direction of the base 91 is restricted. Therefore, even when the first guide 6 is repeatedly pulled out from and stored into the first frame 22, it is possible to prevent each screen removal preventing member 9 from coming out in the longitudinal direction of the base 91 from between each rail portion 63g and each support piece 63h provided on each first guide unit 63 of the first guide 6.

[0051] Furthermore, at one longitudinal end of each screen removal preventing member 9 where the base 92 enters inside each first stopper 103, the needle-shaped portion 91 protrudes inward in the opposing direction of both first stoppers 103, 103 through the notch 103c and is not in contact with the second stopper 64a. Therefore, it is possible to prevent the base 91 of each screen removal preventing member 9 from being removed in the longitudinal direction without interfering with the needle-shaped portion 92.

[0052] In addition, a plurality of stopping units 64 can be connected in the connection direction of each first guide unit 63. In the screen device SD shown in FIG. 1, the roller pipe 31 is built in the second frame 3, and when the closing operation of sliding the first frame 2 to the left is performed, the screen 1 wound around the roller pipe 31 is unwound with the closing operation. If the first guide 6 is formed by connecting the first guide units 63 to the fixed end to the second frame 3, the unwound portion of the screen 1 may come into contact with each of the support pieces 63h of some of the first guide units 63 located on the fixed end side, and the lower end of the screen 1 may be bent inward in the opposing direction of both side walls 63a, 63a of each first guide unit 63, or may be rubbed and worn. As described above, the stopping unit 64 is one in which the support pieces 63h have been removed from each first slide guide 63, and is therefore effective for the screen device SD shown in FIG. 1.

[0053] That is, as shown in Fig. 8, a plurality of, for example, two, stopping units 64 are connected to the right end of the first guide 6 located on the fixed end side to the second frame 3, and the stopping unit 64 located on the left end is connected to the first guide unit 63. In such a screen device SD, it is possible to prevent the fixed end side portion of the first guide 6 from coming into contact with the unrolled portion 1a of the screen 1. Therefore, when the first frame 2 is closed, it is possible to prevent the lower end of the portion 1a unrolled from the roller pipe 31 of the screen 1 from bending inward in the opposing direction of both side walls 63a, 63a of each first guide unit 63, or from being rubbed and worn down.

[0054] The tension member 8 shown in FIG. 1 is, for example, a string, which is hung on both direction change members 15, 15 arranged at the lower end and upper end of the first storage section 22, and is inserted from the first storage section 22 to the second storage section 23 through between the first guide pieces 21, 21. A knot is formed at one end of the tension member 8. This knot is inserted into a slit extending downward formed at the lower end of the guided member 12 forming the free end 71 of the second guide 7, hooked on the lower end edge of the guided member 12, and fixed to the guided member 12. The other end of the tension member 8 is hung from above around the right end part of the head of the screw and directed upward again, and a knot is formed at the upper end. This knot is inserted into a slit extending downward formed at the upper end of the guided member 12, hooked on the upper end of the guided member 12, and fixed to the guided member 12. The screw is passed through an elongated hole extending in the vertical direction formed in the guided member 12. Then, the vertical tightening position of the screw relative to the guided member 12 is adjusted, and a predetermined tension is applied to the tension member 8. Furthermore, the tension member 8 is pressed leftward by a screw and fixed to the upper end of the adjuster 10 forming the free end 61 of the first guide 6 at a portion located in the first storage section 22 between the two direction changing members 15, 15. In this way, the tension member 8 connects the free end 61 of the first guide 6 and the free end 71 of the second guide, forming a loop disposed in the vertical direction. The tension member 8 forming such a loop makes the storage length and the pull-out length of the first guide 6 in the first storage section 22 the same as the storage length and the pull-out length of the second guide 7 in the second storage section 23, and as a result, the first frame 2 can be reliably slid parallel to the second frame 3. The parallel sliding of the first frame 2 is also achieved when the user performs a closing operation at any position in the vertical direction of the first frame 2. Furthermore, the parallel sliding of the first frame 2 is also achieved during an opening operation by the elastic force of the coil spring 31a. The predetermined tension applied to the tension member 8 can be appropriately set in consideration of the above-mentioned sliding of the first frame 2.

[0055] Although the present invention has been described above with respect to the above embodiment, the present invention is not limited to the above embodiment. For example, the screen device SD may be an automatic storage type that utilizes the elastic force of the coil spring 31a as in the above embodiment, an automatic opening and closing type that includes a motor and utilizes the torque when the motor rotates to unfold and store the screen 1, or a manual opening and closing type that manually unfolds and stores the screen 1. Also, the screen 1 may be one that has a plurality of foldable pleats formed thereon. Furthermore, in the case of the manually opening and closing type screen device SD, the second frame 3 is not fixed to the opening, but is made slidable in the left and right directions like the first frame 2, so that the screen device SD can be made into a double-opening type. The Z-axis direction is not limited to the vertical direction, and may be any direction perpendicular to the X-axis direction. For example, the screen device SD can be installed in an opening that is inclined with respect to the vertical plane. [Explanation of symbols]

[0056] SD...screen device, 1...screen, 2...first frame, 22...first storage section, 23...second storage section, 3...second frame, 6...first guide, 61...free end of first guide 6, 62...portion of first guide 6 pulled out from inside first frame 2, 63...first guide unit, 63a...side wall, 63b...bottom wall, 63c...pin, 63d...opening, 63g...rail portion, 63h...support piece, 63j...recess, 64...stopping unit, 64a...second stopper, 7...second guide, 71...free end of second guide 7, 8...tension member, 9...screen removal prevention member, 91...base, 92...needle-shaped portion, VL...virtual line, 10...adjuster, 103...first stopper, 103a...open end, 103b...closed end, 103c...notch, 15...direction change member.

Claims

[Claim 1] A screen that can be freely deployed and stored; a pair of frames consisting of a first frame and a second frame that are elongated and hollow in the Z-axis direction, at least one of which is slidable in the X-axis direction and arranged opposite to each other in the X-axis direction, with the screen being deployed and stored in the X-axis direction of three orthogonal axes, the X-axis, the Y-axis, and the Z-axis; and a frame that has a free end at one end and is pulled out from inside the slidable frame in the other X-axis direction when the slidable frame is slid in one X-axis direction, and is stored inside the slidable frame when the slidable frame is slid in the other X-axis direction. a tension member housed inside a slidable frame and connecting free ends of the first guide and the second guide, one end of the screen in the X-axis direction is fixed to the first frame and the other end of the screen in the X-axis direction is fixed to the second frame, the portion of the first guide pulled out from inside the slidable frames extends linearly in the X-axis direction between one ends of the pair of frames in the Z-axis direction, and the portion of the second guide pulled out from inside the slidable frames extends linearly in the X-axis direction between the other ends of the pair of frames in the Z-axis direction, The first guide is formed by connecting a plurality of first guide units, each of which has a pair of side walls arranged opposite each other in the Y-axis direction and a bottom wall connecting the both side walls, and of two adjacent first guide units in the first guide, one first guide unit is pivotally supported to the other first guide unit, and this pivoting allows the first guide to bend in the other Z-axis direction while maintaining its linearity in the X-axis direction, and one end of the unfolding screen in the Z-axis direction is inserted between the both side walls of each first guide unit in the portion of the first guide pulled out from inside the slidable frame, a pair of pins facing outward in the opposing direction of both side walls are provided at one end in the X-axis direction of both side walls of each first guide unit, and a pair of openings are formed at the other end in the X-axis direction; two adjacent first guide units are connected by loosely fitting the pins of one first guide unit into the openings of the other first guide unit, the two pins form a pivot, and each first guide unit is freely pivotable; a rail portion is provided on an inner portion of each of the side walls of each of the first guide units in the opposing direction, the rail portion extends along an imaginary line within a plane including an imaginary line connecting the centers of the pivots of each of the first guide units in a coupling direction of the first guide units, and a support piece is provided at an end edge portion of each of the side walls that is farther away from the bottom wall in the other Z-axis direction than the rail portion and protrudes inward in the opposing direction of the side walls; a screen removal prevention member having a number of needle-shaped portions attached at intervals to a long base portion which is bendable in the pivot direction of each first guide unit, is removably attached to the inside of both side walls of each first guide unit in the opposing direction, and when each screen removal prevention member is in an attached state, the base portion is supported between each rail portion and each support piece of each first guide unit, and all of the needle-shaped portions protrude inward in the opposing direction of both side walls of each first guide unit, When the first guide is pulled out in the other X-axis direction as the slidable frame slides in one X-axis direction, the needle-shaped portions of each screen removal member pierce one Z-axis direction end of the screen inserted between both side walls of each first guide unit in the pulled-out portion of the first guide, making it impossible for the screen to be removed from the pulled-out portion of the first guide, while when the first guide is stored inside the slidable frame as the slidable frame slides in the other X-axis direction, the needle-shaped portions of each screen removal member come out of one Z-axis direction end of the screen, a long adjuster which forms the free end of the first guide and has a weight attached thereto and moves up and down in the Z-axis direction inside the slidable frame is connected to a first guide unit which is located at the other end of the first guide in the Z-axis direction when the adjuster is stored inside the slidable frame, the adjuster is provided with a pair of hollow first stoppers which face each other in the Y-axis direction at the end on the side to which the first guide unit is connected, each first stopper has an open end on the first guide unit side and a closed end on the side opposite the open end in the longitudinal direction of the adjuster, and a linear notch is formed on each of the inner surfaces of the opposing directions of both first stoppers on an extension line of the rail portion of the first guide unit connected to the adjuster, In the first guide, a stopping unit is connected to a first guide unit that exists at a position corresponding to the other end in the X-axis direction of the pulled-out portion when the first guide is pulled out from inside the slidable frame, and this stopping unit is provided with a second stopper that extends upright from each rail portion to the other end in the Z-axis direction of each side wall at the connecting end with the first guide unit while the support piece is removed from the first guide unit, The screen device is further characterized in that when each screen removal prevention member is attached, one longitudinal end of the base of each screen removal prevention member is inserted into the interior of each first stopper of the adjuster, one longitudinal end of the base abuts against the closed end of each first stopper, and the other longitudinal end of the base of each screen removal prevention member abuts against the respective second stopper of the stopping unit, and in the portion of each screen removal prevention member where the base is inserted into the interior of each first stopper, the needle-shaped portion protrudes inward in the opposing direction of the two first stoppers through the notch and is not in contact with the second stopper.

Images